XML 22 R34.htm IDEA: XBRL DOCUMENT v3.5.0.2
Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Registrant Name dei_EntityRegistrantName NUVEEN INVESTMENT FUNDS INC
Prospectus Date rr_ProspectusDate Sep. 30, 2016
Document Creation Date dei_DocumentCreationDate Sep. 28, 2016